Married, no sex life, miserable.

My wife has lost all sexual interests in me, and it got me very frustrated. We haven't had real initimate sex for more than two years. I feel like this marriage is going to suffer because of this. We are wonderful together except for the sex, so it seems very stupid to even consider ending it and I don't think I'll do that, but it does get me very depressed feeling unwanted and unloved, and miserable when my sex needs went unmet. We have only even together for 4 years, married for a year, both at our early 30s. I can't imagine a sexless life ahead of me.